Key cutting machine



Jan. 31, 1933. c. A. HAUBROE KEY CUTTING MACHINE' Filed Aug. 29, 1932 2 Sheets Sheet l 1933. c. A. HAUBROE HEY CUTTING MAHINE Filed Aug.. 29, 1932 2 Sheets-Sheet 2 INVEN OR.

cme; ES 4 1700330! By %ami Z ATTORNEY.

Patented Jan. 31, '1933 CHARIES A. :meriton OF B TIMonE; ARLAND i 1 a pnctin filed au ust'as, ez Serial eas.

.blers of a lock cylinder when an uncut blank is put inthe cylinder and thus determines .the depth, location and number of outs necessary to'cut 'a keyto fit the cylinder, themachine requiring no pattern or code to fit a key to any cylinder lock. i

Another object is to provide a machine of this kind, embodying a supporting 'seat in which the lock cylinder into which an uncut blank has been inserted, is clamp'ed, a blank carrier adapted to Swing towardand away from a cutting wheel, the blank carrier hav'- ,ing a finger or fingers to engage the outer periphery of the cylinder, a stop whereby a key blank in the blank carrier will just touch the cutting edge of the cutting wheel when said finger'rests against the cylinder, and a means for moving the blank carrier forward toward the cutting, wheel'untilthe finger rests on the end ofone of the protruding tumblers, whereby the key blank may be swnng forward against the cutting wheel and cut to a depth or distance equalto the protrusion of the tumbler from the cylinder. i

With these and other objects in View, the invention resides in the novel Construction and arrangement of parts as hereinafter' set forth and claimed, reference being had to the accompanying drawings, wherein j Figurel is a side elevation of the machine showing a lock cylinder with inserted blank and a blank arranged for cutting. 4

Figure 2 is ai section along the line 2-,-2 in Figure 1. e i

Figure 3 is a plan View ofthe blank carrier and cylinder carrier or -seat alone showing the finger on the blank carrier in engagement with theend of a plunger in the lock cylinder, this View showing also a part of the cutting wheel to indicate its relative position.

Figure 4 is a side elevation of the cylinder seat alone. 4 s

.jFigureis a vertical t through a modifiediorm' ofmy'invention.

Figure is a plan View' of; the structure i shown in Figure 5', a part of the base being broken away. g; a i

Figure 7 is a' plan view ;of thecylnder seat aloneg "e i e Figure 8 is a side View of` the cylinder-seat. Figure 9 isa section-along the 1ine 9-9 in Figure 6. i i

Referring now with more 'particularity -to the drawings, the embodiment of" my inven tion shown in Figures 1 to 4, comprises a pair 'of hearing postsor ends 1 setup in spaced relationship on' a base 2 and having bearings' at their upper ends through which a` cutter shaft 4 is journaled carryin'g the cutting wheel or rotary file 5. This shaft may be driven' in any suitable Inanner as torinstance by` a motordriven belt (not shown) trained overthe .pnlley 6". The cutting' wheel 5`is supported at some distance above the base 2; and a carrier shaft 7 'isej'ournaled inbearings 8 onuthe ,ends 11 below' and ?some distance outwardly of the shaft 4, as shown in F igure 2. A' cylinder' carrier arm 9, having a hub-10, is mounted'b'y'this hub on the 'shaft 7 'and'is secured rigidly thereto by a keyll.

Extending from the hub 10 and at an obtuse angle from the arm 9,. is astop leg 12 having a threaded bore 13 at .its 'end through 'which is securedva stop screw 14 adapted to`impinge on arest 15 extended upwardcfrom the' base 2 beneath the shaft 4, the arrangement being-such that the cylinder carrier arm 9 may be swung toward the cutting wheel 5,

carrier or'seat 'designated generally at `16` is provided on the free endvof the arm`j9 and' to the arm, as desired. ,A lock cylinder A of turning the shaft 7, but thisimovement will .be'limited by the'stopscrew 14 strik'ing' the V ,rest `*15,as will be understood. A cylinder i conventional form is adapted to restin the corner or recessfformed at the junctionof the base17 and back 18, and is Secured there in' by an L-shaped clamp arm 19 pivoted at one end at 20 between ears 21 formed on the back 18 and eXtended upwardly alongside the 'back and over the' seat and having a threaded socket 22 in its end. A clamp screw 23 is threaded through this socket '22 and has r i a cupped or recessed rotatab-le clamp plate 24 atitsend,` which maybe pressed against the cylinder by turning the screw 'to hold thecylinder 'in place. An additional clamp 'screw 25 is threaded at 26 throughthe back r portion 27 of? the "clamp" "arm and bears against the back 18 of the seat 16,the result' threaded ;in the back; the said gauge being i thuS'adjustable" longitudinally on the back project-"diflerent distanc'es from the p'eriph of the seat, as will be understood. The 'gauge 28 has 'an end 32 turned inwardly over the basel' of theseat 16 from one end of 'its tangj29,=a nd this end 32 is so disposed that thecylinder A may 'have'its key receiving endB (usually flanged as shown) butted against this end to determine and set the position of the cylinder on the seat. In addition', the seat 16 has an' extension`33 projectedjendwise from its base 17 and having a sokt 34 formedin its outer end to receive an expan'sion coilspring 35 and the plunger '36. The'plunger36has a flat pressure plate 37 on; its-upper endgthe :function of ;which is to bear Upward, 'under the influence of the spring 35 against the underside of thehandle Or head' Offa key blank C inserted' in the cylinder f' The cylinder 'A is thus held 'against 'rota't'io'n the 'seat and, as shown in 'the drawings, theflposition assumed by the 'cyli'd'er mountedin the seat, issuch that the 'tumbler pinsjD therenextend or point to- 'ward 'the cuttng ;wheel 5. Normally these pinsD lie' flush at their oiter ends with the periphery of the cylinder A, andare of different length inponventional manner. When an'uncutgkey blank, as is :inserted in the cylinder, it will strike the inner ends of the pinsD and will force the same outward until their innerends areflush with thekey-wayin the cylinden Thefresultis that these pins i ery por the "cylin'der as in Figure 3, due to "tofit the" cylinder, as will be understood.

theirdiferencesin length, and these dis- 'tgan'ces`arefldirectlyproportional to the depth of the' cuts'necessary 'in' the key :for the'key r A blank carrier arm 38 is provided, having a hub 39 at one'e'nd by which it is pivotally mounted on' theshaft alongside the arm-9, and' :having a radially extnded threaded socket40 'through its hub to receive' a looking screw 41,' which' 'provided' at its outer end with aj wing42to facilitate its adjustment I :withoutthe'use ofitoolsi A'blankclamp des ignated geiierally at` :4319 provided on the plate 44 formed integrally with thearm and disposed at right angles thereto and having spaced apertured hinge ears45 formed on its margin remote from the cutting wheel 5,'

between which a clampplate 46 is hinged by a pin- 47. The base plate 44 hasa rib 48 at some distance from its margin', thus profree endiof the arm 38, and comprises a base extended longitudinally along its upper face lying against the rib, as shownin Figure 2.

The keyblank Emay be secured in'this position bythe clamp plate 46 which has ;a lip 49 eXtended longitudinally along the undersidelof .its free margin and 'adapted to engage and bear against the blank. The clamp plate is pressed tightly 'on the key blank'by a wing screw 50 passed loosely' through an aperture 51 in the clamp plate and threaded at 52 in the base plate' A nger 53 isformed on the rear margin of'the base plate 44 at the end neare'st the cylnder carrier arm &and extends rearwardly, therefrom as. shown. A rest 54 is eXtended laterally'from the {base plate 44 at its forward edge to. support the handle or head of the key blank E placed in the clanip. It will be noted in Figure 1,'

that the cylinder seat l'and the clamp 43 are ofiset laterally and oppositely from their respective supporting arms 9 and 38, wherebythe clamp 43 may pass alongside of the seat 16 and between this seat and the cutting.

wheel 5, as shown in Figure 3. In the operation of cutting lockjcylinder A and the cylinder is placed in the seat '16 With its .end B abutting against the end'32 of thegauge 28 and with the head -of the blank engaged by the pressure plate 37. i The protruding tumbler pins D thus eX- a key to fit lock, an uncutkey blank C 'is placed in the a sms tend in a direction towardthe cuttingwheel A 5 as aforesaid, and the cylinder A is. then locked in this p'ositionby the clamp screws 23 and 25. An uncut key blank E, is then placecl'in the clamp 43 and Secured in place by the 'wing screw 50. It will be 'noted in toward the right. The looking screw 41' being loosened, the ,blank carrierarm 38 is adjusted so that the finger 53.engages 'the periphery of the lock cylinderA and the screw &

41 is tightened, looking the arm 38 to the e shaft 7. Thewholeassembly supported' by the arms 9 and 38 is then swung toward the cutting wheel 5 until the edge of'the wheel just touches the expose d and overhanging edge of the blank' E in 'the clamp 43.' The stop screw 14 is then adjusted'to engage the rest 15 and thereafter limits the 'movement of the parts toward the; cutting wheel. The

'parts being then'swung back clear of the cutting wheel, the looking screw 41` is -loosened and the arm 38 swungforward and moved laterally'on the shaft 7 until the finger 53 eni 5 gagesthe tumbler` pin'D nearest the outer end of the' lock cylinder as shown in Figure 3 The screw 41 isthen again tightened and the assembly swung toward thecutting wheel's The clamp 43 has now been set forward'towards the wheel a distance equal to the protrusion 'of the tumb'ler pin D against which the finger 53 jrests, and the blank E willthus move into the rotating wheel' 5 and be cut on its exposed edgeto a depth equal tothis *protrusiom as will be understood. This cut being finished, the screwv41 is again loosenedand the 'clamp 43 and arm 38 moved si dewise on the shaft 7 "until the finger 53 en- 'gages thetumbler piniD next in order, and the screw 41 is again tightened and another cut made? The operation is repeate d until the last tumbler pin is reached, after which "the outs are rounded ofi' and the blank 'E removed and 'is now a, completed key' to fit the cylinder A; The cuts proceed in regular `order\ along the length of the key blank E in the proper position and spacingbecause of the opposite positioning of the 'key blanks C and E as aforesaid and as will bereadily apparent' in 'Figuret 3.` The operations necessary in cutting and completing a key are 'simple,` rapid and easily performed. i

Referring' to the embodiment of my invention shown in Figures 5 to 9, the base Qa has hearing ends la through the upper parts of which is journaled the shaft 4a carrying the cutting wheel 5a. Ashaft 7a is ournaled and, in this case, also .slidably mounted through a bearing Sa-'in one end la and acrossthe base Qa. A hearing sleeve. 55 is journaled on the other end of the. shaft 7 a and is locked against aXial movement thereon by collars 56 secured by set screws 57 to the shaft at each end of the collar. This sleeve 55 is slidably and rotatably' mounted in a hearing block 58 on the base Qa and the shaft 7a is thus slidably supported at each end below 'and to one side of the shaft 4a. The

'hearing block 58 has a recess 59 communicatv ing with the bore 60 through whichthe sleeve 55 extends and a clamping dog 61 is slid ably mounted in this recess and may be pressed against the' sleeve to lock the shaft 7a against aXial movement by means of a locking screw 62 threaded through a hole 63 communicating with the recess 59 as shown, the said screw 62 having a wing 64 for its convenient adjustment The sha-ft 7a may, of course, rotate freely in the sleeve 55 at" any longitudinal adjustment.

The blankcarrier ari 38a has a at one end by which it is rotatably and slidably mounted on the shaft 7a and this hub has a threaded soc'ket 40a to receive a 'locking 65 i screw 41a. i At its free end the arm` 38a` has against the blankby a wing screw: 50a ideningthe adjusting'screw 70, it being of course i also necessary to first loosen andthen tighten "a blank`clamp designated .generally at i 436& 'and comprising the base 44a. and the clamp plate 46a hingedthereto by a pin 47a 'passed through ahingellugmia; The base `44a has a rib 48a' to act as astopand rest for the keybl'ank 'E' and the clamp plate 46a` has a depended' lip 49to engage the blank, i the said clamp plate ;being drawnetight tically as ;described hereinbefore. ;This

clamp -arrangernent is similar to the clampf" 43-"previously describedb Adjacent' its free end, thearm 38a has a laterally extended' shoulder or 'boss 65 through which extends a relatively large bore 166 openingat the .outer 280 or end face of the boss and communicating at' its inner rend with a Vredu'ced axially aligned bolthole: 67. .Adj acent the inner end of the bore 66,4a recess 68 is cut opening Out i through the upper and lower sidesof the boss 65and'a tapped thumbnut 69 is disposed in this recess and threaded on athreaded ad justing screw 70 disposed inthe` bore 66. The arrangement is such that the screw 7 0 may be'exten'ded or 'retractedfrom .the out'er i `end of the bore 66 by rotatng the thumb nut 69, as will be understood. The screw 70 has .an axially eXtended' bore 71 aligned with the e bolt hole 67- and adapted to :freely receive a i clamping bolt 72 passed through the said .8 hole67 and bore 71 and extending at its end .from the -adjustng ,screw 70 as' shown. A

finger 73 isextended from the outerend of the boss 65 at apointreniote'from the cutting wheel 5a.'- 3 V i v a ;LDD

A depth gauge arm9l having a hub 74 is journald and slidably mounted by this hub on the shaft 7a' alongside the arm` 38@ and has its outer end 'disposed;alongsidejthe boss i 65 on the. blank carrier arm 38a. :This outer 9.1

end of the arm 91 has' an arcuate slot 75 cut on a radius centered on the center of the shaft 7 a'and this slot 75 is adapted to `freely receive theextended ,endof'the clamp bolt 72 tolimit the swinging movement of this F 1 arm 91 relatiVeto the arm 38a. The depth gauge arm 91 may be locked in any adjusted position by a knurled lock nut 7 6 threaded on the end of thefclamp bolt 72 and adapted to draw the endof the arm 91 up tight against (1115 the end of the adjusting'screw 70. The arm a 91 may also be adjusted laterally toward 'or r away from the end `of the hub 65 by turning the thumb nut 69 and retracting or'eXtend stop leg 78 havin'ga threaded aperture79 in its outer'tend to receive a sto'p' screw14`a similar t' the aforesaid stop screw 14 and which' is adapted to 'contacta rest' 15a ex-" v i ten'de d upwar' d i froni the base" 2a to limit* the 'movement of the arms -cutting wheel '5a. V e i i v The cylinder carrier or seat designated generally at 16afl: is this embodiment 38a and 91 toward' the Q mounted 'onthe base, Qa outwardly 'of the shaft 7a` and comprises a horizontally dis'- posed base 1711 'and a .vertically extended I back 18a .on the margin ,of 'the baseremote' 'from said 'sma 7a; The l c cylnderAtn which 'anuncut key blankC' has been inw i serted' isvplaced in the seat exactly as here- Linbefore' described and is held therein bya :clamp designated generally at 80 and comprisingthe U-shaped clamp warm 81 withan- :gularly under-cut faces. 82' adapted' to engage the lock cylinder A' and the clamp' screw 83 cextended from this arm 81 through a passage 84-^ cutlaterally acrossithro'ugh the base 17a.

wing clamp nut 85 is threaded on; the outwardlyextended end of the screw 83 and is adapted to draw the clamp arm 81 tight `against the cylinder A' and thus hold the 'same ri'gidly in place. A gauge28a is provided, 'comprising a longitndinally slotted tang 29a' adjustably secured on the back18a by screws3la and having its end 32a turned inward'ly over the end of the chair to-adjust and hold theilock cylinder A' longitudinally 'in its seat 16a. In lieu of the pressure plate arrangement 37 of the seat 16 in the previ- -ously described embodiment, a'vertical gange 86 isprovided, comprising a tang 87 having a longitudinal s1ot88 and adjustably mounted on a shoulder or extension 33a eXtended rrom the base 17abyscrews 89 'passed loosely' through this slot ,and-'threaded ingthe 'shoulder or extension key' engaging le 90 isextended vertically upwardfrom the tan'g 87 and' by arranging'the lock cylinder A' in the seat 16a untilthe head or handle of the key blank C' bears fiat :against the 'edge of this leg 90, the cylinder will besheld againstrotation with itstumbler pins D' extended upwardin correct position. The leg'90 is normally pulled into engagement with the key by a retractile coil spring 92 Secured at 93 to thetank 87 and at 94: to the extension-33a and stretched between' these H v V' e In the use of this embod'iment ofmy machine,-an uncut keyblank asC' is inserted 'in 'the lock cylinder A' to which it is dei C s sired to fit ;a key and the cylinder is placed pins D' extending upwardly. A keyblank in the seat' 16a with the protruding tumbler 1 3 is then placed in the-cla m p 43a as shown,

*and Secured by tightening the wing screw 50a. The thumb nut 69 and' lock'nut 7 6 are then loosened and the arms 38a and 91 swung downward until 'theends of the 'twofingers' 73 1 and 77= both engage the end, ofthe tumbler pin -D'-`nearest the'key receiving end of {the cylider A'.- The lock nut :76 a`nd the 65 'lock screw, 41aare'then tightened and the inderstood that Imay ,vary fromthe same in :pended claims.

;cutting ..wheel,` al-o'ck cylinder seat, 'a lock .cylind'eri mounted on ,the seat from which arms a 38& and 91 ,swung toward the uttinga wheel 5a and the stop' screw" 14a adjusted until the projecting' edge -of the key blank E' just touches 'the: edge of thegcutting wheel when said screw lla engagesi therest, 15a.-:2

The parts are'then again 'swung down toward; v the'cy'linder seat lciand the lock nut 76 `is loosened ,andthe thurnb nut 69turneduntil .moved downward into en'gagementawith the periphery of'` the lock cylind'erA', this being V the relative position ofthe fingers 7.3 and77 s shown in Figures and 16; .The lock :nnt' f is .then again -tightened" andtheparts'swung E@ i toward thernow rotating:cuttingwheel-* i andthe arm 38a beings'et forward ofthef depth gauge arm 91, the -13121111215" ;will be 'cut to a depth equal to the distance .betweenthe ends of the fingers `73 and 77 a'nd'the-protru a sionof thetumbler pin D". "Toxmake the next' and? follow-ingcuts, the a operation is repeated and both the ,arms 38a and 9lmoved i i laterally of the base to a position where the adjusting the shaft: 7al0ngitudinally: and locking it by the clamping ,dog 61 engaging the'sleevex asrwill beaunderstood i Furtherdetails'` of the operatio'n of 'my i inventionawillbe readily apparent to those skilled in' the art to which it pertains, and the Simplicity, efliciency and relative low cost of the 'machine as r described fwill bei obvi v ous. r It will be further undrstbodthatthe fund'amental principlev of` determining` the depths and' positions of: thecuts necessary, in a* key by measuring the protrusion ;of the tumbler pinsfrom a lock cyl-ndr into which a blank has been-insertedmay' be employed in machines constrncted ,in many ways andv using v sliding' "as well 2 as' swinging feeds :as

herein described, 'and such` variations are considered. within the scope of' my invention.

While'I have 'herein set forth certain prefcrred embodimeit's of my invention, it ;is

minor strnctnraldetails, so as bestto construct a practcal ldevcefor :the 'pnrposesfini tended not departings fromj the spirit of my invention and* within lock cylinder the tumblerpins are extended by a key blank inserted inithe cylinder, a blank clamp movable toward and away from the cutting wheel and adapted' for engagement with the tumbler pins and lock cylinder, whereby the protrusion of the said tumbler pins Controls the cutting of a key blank in the clamp.

3. In a key cutting machine, a rotatable cutting wheel, a lock cylinder seat, a'lock cylinder mounted on the seatfrem which lock cylinder the tumbler pins are extended by a key blank inserted in the cylinder, a blank clamp movable toward and away from the eutting wheel and adapted for engagement with the tumbler pins and lock cylinder, whereby the protrusion of thesaid tumbler pinscontrols the cutting ofa key blank in the clamp, and means for .clamping a' lock cylinder in the said seat. a

4. In a key cutting machine, a rotatable cutting wheel, a lock cylinder seat, a hinged I blank carrier arm adaptedfor movement between the lock cylinder seat and the 'cntting wheel, a clamp on the blank carrier arm adapted to receive a. key blank for cuttingby the cutting wheel, and means 'on the blank carrier arm cooperating with' a lock cylinder in the lock cylinder seat to regulate the depth and position of outs made in the key blank.

5. In a key cutting machine, a rotatable cutting wheel, a lock cylinder seat, a lock cylinder mounted in the seat and having its inder and the tumbler pins projecting there- "from V v 6. Ina key cuttingmachine, a rotatable cutting wheel, a lock cylinder seat, a lock cylinder mounted in .the seat and having its tumbler pins proj ected by an uncut key blank,`

a hinged blank carrier arm adapted for movement between the lock cylinder seat and the cutting wheel, a clamp on the, end of 'the blank carrier arm adapted to receivea `key blank in position for cutting by the cutting wheel, a finger on the end of the blank carrier arm adapted to engage the lock cylinder and the tumbler pins -projecting therefrom, and means for laterally adjusting the blank carrier arm to bringthe said finger into engagement with any of the tumbler v i pins from end to end of the lock cylinder.

end of the cylinder carrier arm, a blank car- 4 rier arm pivotally and adjustably mounted on the shaft alongside the cylinder carrier arm, means for looking the blank carrier arm v 8. Ina key cutting machine, a'rotatable cutting wheel,a shaft below and to one side of the cu'tting wheel, a cylinder carrier arm e 4 secured to the shaft, means for limiting the movement of the cylinder carrier arm toward the cuttng wheel, a cylinder seat on the outer endof the cylinder carrier arm, a' blank cari rier arm pivotally and adjustably mounted on the shaft alongside the cylinder carrier arm, means for looking the ;blank carrier arm to. the shaft, a clamp on the outer end of theblank carrier arm adapted to hold a key blank, and a finger eXtended from the clampand adapted to engage lock cylinder or the tumbler pins thereof as mounted in the lock cylinder seat, the said lock cylinder` seat and clamp being ofiset from the cylinder carrier arm and blank carrier arm, whereby the clampmay eXtend and move' laterally i between the lock cylinder seat and thecut-` ,ting wheel. I x

9. In a key cutting machine, a supporting base andends, a rotatable cutting wheel, a'

longitudinally adjustable and rotatable shaft e extended between the ends and disposed below and to one side of the cuttingwheel, a

- lock cylinder seat mounted on the base outi wardlyof the said shaft,` a blank carrier arm g adjustably mounted on the shaft and adaptcylinder' seatand cutting wheel, a key blank holding clamp on the end of the blank carr. rier arm, a finger extended from the outer ed for swinging movementbetween the lock end ,of the blank carrier arm and adapted to engage the projecting tumbler pins of a lock cylinder in the seat, a depth gauge. arm piv- 'otally and slidably mounted on the shaft i alongside the' blank carrier' arm,means for adpsting the said depthgauge arm f'orwardly, rearwardly or laterally of the blankcarrier arm, means for limting the movement of the depth gauge arm toward the cutting wheel, and a finger extended from the outer end of the depth gauge arm alongside the said finger on the blank carrier arm. v

ill-20 *Intestimony'whereof Iaifix 'my signature 5 CHARLES A. -HAVUBROE.

7. In a key cutting machine, a rotatable 4 i movement of the cylinder carrier armtowarcl the cutting wheel, a cylinder seat on the outer 

